EUCHLANIDiE. 89 



Salpina marina, Gosse (169), (PI. XXXI. fig. 33). 



[SP. CH. Occipital spines two, procurvcd ; pectoral tiuo, short ; lumbar S2nne 

 short, deep ; alvines stout, separated from the lumbar by an angular sulcus. 



This large species was taken in a tide-pool in the Firth of Tay ; the first Salpina 

 found in the sea. Its anterior armature is that of S. mucronata, but the posterior is 

 peeuUar, in that the alvines are stout, nearly straight spines, and that the sinus which 

 divides each from the lumbar point is not rounded, but makes two sides of a rhomboid, 

 with definite angles. The specimen was dead when I found it. 



Length (of lorica from points to points), y^^ inch. Habitat. Marine. P.H.G.] 



Salpina eedunca, Ehrcnberg (42). This is, I think, S. hrevispina. The only differ- 

 ence is, that its lorica is said to be smooth in front instead of being stippled. 



Salpina affinis, Herrick (175). Very like m^icronata, but with longer occipital and 

 alvine spines. 



Euchlanis conica, Schmarda (135), (PI. XXXIII. fig. 34). 



SP. CH. Lorica conical ; dorsal occipital edge concave, semi-elliptical ; hind 

 dorsal edge with a semicircular notch ; three teeth in each vialleus. 



This curious Euchlanis adds to the attraction of its miusual shape, trophi tinted 

 brown, and a reddish-brown ovary. It has a transversely oval red eye, and two long 

 toes ; but no setse on its foot. Schmarda says nothing about the ventral plate, but the 

 figure seems to show a portion of its margin well within that of the dorsal one : neither 

 does he say if the dorsal plate is arched or depressed. 



Length (to end of foot), ^'j inch. Habitat. Fresh-water, near San Juan del Norte, 

 Central America (Schm.). 



Euchlanis oeopha, Gosse (169), (PI. XXXI. fig. 34). 



[SP. CH. Lorica roof-sluiped with sloping sides, hut not rising to a ridge, yet cleft 

 for a short distance behind, between tiuo descending extremities. Ventral plate fiat, 

 thin, much smaller in its wliole outline than the dorsal ; foot tvith a, single seta or 

 none ; toes thin, Made-shaped. 



This is a noble species, and not uncommon. The posterior fourth of the ovate lorica 

 seems as if pinched-in, and the dorsal edge of this piortion becomes a low double carina. 

 In fig. h, the inner outline is that of this portion, the outer outline represents a trans- 

 verse section through the highest point in figure 84 a. 



Length, ^V inch. Habitat. Lacustrine. P.H.G.] 



Euchlanis pannonica, Bartsch (8), (PI. XXXIII. 33). 



SP. CH. Lorica ovately oblong, large ; foot long, without setce ; toes very short. 



Dr. Bartsch has unfortunately given the rest of his description of this species in 

 Hungarian ; but his figure shows a very deep gap at the posterior end of the dorsal 

 plate. This character, along with the large foot and very short toes, entitle pannonica 

 to be considered a distinct species. 



Length, -^ inch. Habitat. Hungary (Bartsch). 



E. hyalina, Leydig (110). This name has been given by Leydig to a variety of E. tri- 

 quet)-a, conspicuous for its general lack of colour, its less lofty dorsal ridge, and the 

 notching of the hinder end of the nervous ganglion. The first of these distinctions ia 

 probably a temporary one, and the last is to be seen occasionally in other species ; I have 

 met with it, for instance, in pyrifonnis. The second, however, makes me think that 

 Leydig's hyalina may possibly be the variety of triquetra that I have drawn in PI. XXIII. 

 fig. 4 ; for, since the publieafion of vols. i. and ii., Mr. C. Eousselet has sent me some 



