332 PEOCEEDIXGS OF THE ACADEMY OF [May, 



upon the upper anterior portion of the body. These are about 

 6 in number, and the two behind the eye, and over the anterior 

 gill-slits, are the most distinct. Below light brownish, with a pale 

 buff or ochraceous tinge. 



6. Galeorhinus galeus (Linnceus). 



Squalm Galeus Linnaeus, Sjst. Nat., Ed. X, 1753, p. 234. 



Nos. 617 to 620. Types of Galeus canis Bonaparte, Fauna 

 Italica, Pesci, Tomo HI, viii, 1834, 43, PI. 132, fig. 3. Italy. 

 Bonaparte Coll. (No. 248). Dr. T. B. Wilson. 



Mouth. — Moderate, spacious and compressed. Jaws furnished 

 with more or less flattened teeth. The tongue is flat, free ante- 

 riorly, and of a slightly triangular shape with the front margin 

 rounded obtusely. Patches of fine shagreen upon the roof of the 

 mouth and the tongue. 



Pharynx. — Of the usual spacious, elongate, and compressed 

 pattern. Patches of fine shagreen upon the walls of the branchial 

 arches. There are 5 gill-openings within the pharynx, leading in 

 turn into as many gill-pouches, and communicating externally by 

 as many gill-slits. The internal gill-openings are largest anteriorly, 

 and gradually diminish until the last, which is the shortest. Each 

 gill-pouch contains the usual complement of gill-filaments, the last 

 pouch with only h the number of the others and adnate to the 

 anterior walls. Spiracle developed within the pharynx anterior 

 and superior to first gill-opening. No pseudobranchioe. 



CEsophagus. — Short, spacious and walls plicated. 



Stomach. — Elongate and spacious, the walls sparingly plicate. 

 Pyloric region moderate. 



Intestine. — Duodenum short. Colon large and bulky, also fur- 

 nished with a spiral valve. Rectum short and simple, and opening 

 into a cloaca. Rectal gland present. 



Liver. — Large, occupying the greater portion of the abdominal 

 cavity. Both lobes about equal. 



Spleen. — Present in jn-oximity to the pyloric region. 



Pancreas. — Present. 



DALATIID^. 

 6. Dalatias licha (Bonnaterre). 



Squalus Licha Bonnaterre, Tabl. Eucycloped., Icbth., 1783, p. 12. 

 Nos. 478 and 479. Scymnorhinus Bonaparte, Cat. Meted. Peso. 

 Europ., 1846, p. 16 = Dalatias Rafinesque, Caratt. Anim. Sicil., 



