622 A. E. Verrill — Turbellaria, Nemertina^ and 



Var. ? gularis. 



One specimen, differently preserved, and much contracted, is 

 rather deeply tinged with green, and has a narrow dark line across 

 the front part of the anterior segments, and pale sutural lines ; there 

 is also a dark median stripe posteriorly. This was one of the speci- 

 mens mixed Avith Syllis cincinnata and noted, in life, as having the 

 anterior parts orange-red and the posterior olive-green (see page 610). 



This may, perhaps, be an additional species of OpisthosylUs. 



The posterior tooth of the oesophagus is more distinct. The 

 stomach is much like that of the type described above. The cirri 

 and antennae are shorter and more curled, the longer ones about ^ 

 the diameter of the body, but the entire body and the appendages 

 are much contracted. 



The anterior seta? are fewer, stouter, and longer than in the type 

 of nuehalis, esj)ecially the upper ones, on Avhich the blades are 

 shoi'ter and wider, with incurved tips, which are not bidentate. 



The posterior setae are decidedly longer and stouter than the ante- 

 rior, with very oblique, shorter incurved blades, all with acute tips. 

 Two stout acute acicula occur in the posterior fascicles ; three in the 

 anterior. 



Length, as contracted, 10.5'"™; diameter, 1.2™™; much longer in 

 life. 



Bailey Bay, at low-tide, in Palythoa. 



Eusyllis (Synsyllis) viridula, sp. nov. 



A small, very slender, pale green syllid with short, slender dorsal 

 cirri scarcely longer than the breadth of the body ; oesophagus long, 

 slender, with the margin minutel^^ denticulated ; stomach long ; 

 joalpi rather short. 



The head is transversely elliptical, with the middle of the front 

 margin slightly prominent and the posterior margin a little emargi- 

 nate. Eyes small, light brown. 



Palpi separate to base, nearly regularly broad-ovate, about as long 

 as the head, obtusely rounded at the end and not concave on the 

 inner mai'gin. 



The antennae are scarcely tapered, rather short, about equal to the 

 breadth of the head, projecting somewhat beyond the palpi, consist- 

 ing of about 9 annuli, the distal ones well defined. The upper ten- 

 tacular ciri'i are about ^ longer and rather stouter ; the lower ones 

 are about equal to the antennae in size and length. 



The dorsal cirri on segments 1-4 are rather more slender than the 

 upper tentacular cirri but of about the same length and about equal 



