Miscellaneous. 125 



lateral pairs, Avhich decrease from the first to the fourth, which is 

 much reduced ; on the rostro-gastric groove three pairs of teeth,^ of 

 which the middle ones are the most strongly marked; hasal joint 

 of the inner antenna with three anterior processes ; iscluopodite of 

 tlie third maxUllind longer than the meropodite ; the inner branch of 

 the last three pleopoda is biarticulate ; in the first pair of thoracic 

 feet of the male it is the right chela that is modified. 



A species from small depths found in the N^orth Sea, on the shores 

 of Ireland, in the Channel, and in the Mediterranean. 



5. Galathea strigosa, Linne. 



There are no epipodites upon any of the thoracic fed; carapace 

 with the regions well marked by deep grooves furnished with long 

 and close-set hairs ; rostrum elongated, with nine teeth, of which 

 the median one is the longest and the last lateral pair the smallest ; 

 from two to six teeth (according to age) upon the rostro-gastric 

 line ; two teeth a little behind the insertion of the outer antennse 

 and two other lateral ones on the hepatico-gastric grooves ; basal 

 joint of the inner antenna with three processes ; ischiopodite of the 

 third maxilliped longer than the meropodite ; the inner branch of 

 the last three pleopoda of the male is biarticulate. The two chelae 

 of the first thoracic feet are modified in the adult male. 



This large species, which is found only at and below a depth of 

 10 fathoms, is the most widely distributed Galathea of our coasts ; 

 it has been noted as occurring from the North Cape and all the 

 northern seas of Europe to the Canary Islands, and in the Mediter- 

 ranean and lied Sea. — Comptes Eendus, June 11, 1888, p. 1686. 



[Bemarl's on the Phylogeny of the Lamellibranchiata. 

 By Dr. Beitjamin Shaep. 



The author brought forward some points regarding the classifi- 

 cation of the Lamellibranchiata, and stated that in considering this 

 group a diversity of type was to be found that is equal to, if not 

 greater than, that found in any class of the animal kingdom, with 

 the possible exception of the Hexapoda. 



In examining the different forms, he pointed out two well-marked 

 extremes, Ostrea and Aspergillum. In the former, as is well known, 

 the two large unequal sheUs entirely cover the body, and they are 

 closed by one large muscle, the adductor. The large and important 

 organ, so common in the Lamellibranchiata generally, the foot, is 

 entirely absent. The mantle-edges are separated for nearly their 

 whole extent, and there is no indication whatever of the mantle 

 uniting to form a siphon. 



In Aspergillum, on the other hand, the two shells are so diminu- 



